<template>
  <div id="app">
    <el-menu :default-active="activeIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect">
      <el-menu-item index="1">首页</el-menu-item>
      <el-submenu index="2">
        <template slot="title">HTML</template>
        <el-menu-item index="2-1">选项1</el-menu-item>
        <el-menu-item index="2-2">选项2</el-menu-item>
        <el-menu-item index="2-3">选项3</el-menu-item>
        <el-submenu index="2-4">
          <template slot="title">案例</template>
          <el-menu-item index="2-4-1">选项1</el-menu-item>
          <el-menu-item index="2-4-2">选项2</el-menu-item>
          <el-menu-item index="2-4-3">选项3</el-menu-item>
        </el-submenu>
      </el-submenu>
      <el-menu-item index="3">CSS</el-menu-item>
      <el-menu-item index="4">JavaScript</el-menu-item>
    </el-menu>
    <div class="line"></div>
    <router-view/>
  </div>
</template>

<script>
import './css/index.css'
export default {
  name: 'App',
  data () {
    return {
      activeIndex: '1',
      activeIndex2: '1'
    }
  },
  methods: {
    handleSelect (key, keyPath) {
      console.log(key, keyPath)
    }
  }
}
</script>
<style>
  #app {
    border: 1px solid red;
    box-sizing: border-box;
  }
</style>
